title: Exercise-induced left bundle branch block: an infrequent phenomenon: Report of two cases.
abstract: Exercise-induced left bundle branch block (EI-LBBB) is infrequent phenomenon. We present two patients with angina pectoris who developed EI-LBBB during exercise tolerance test. The first patient with typical angina pectoris had significant obstructive coronary artery disease (CAD) requiring percutaneous coronary intervention of multiple lesions including placement of drug eluting stents. The second patient had atypical chest pain without signs of CAD at all. EI-LBBB occurred at a heart rate of 80 bpm and 141 bpm in the first and second patient, respectively. EI-LBBB remained visible through the test till the recovery period in the first patient at a heart rate of 83 bpm and disappeared at 96 bpm in the second patient. Both patients with this infrequent phenomenon are discussed and the literature is reviewed.
authors.affiliation: Salah AM Said, Marisa Bultje-Peters, Rogier LG Nijhuis, Department of Cardiology, Hospital Group Twente, 555 DL Hengelo, The Netherlands.
authors.forename: Salah Am
authors.initials: SA
authors.lastname: Said
authors.forename: Marisa
authors.initials: M
authors.lastname: Bultje-Peters
authors.forename: Rogier Lg
authors.initials: RL
authors.lastname: Nijhuis
keywords: Angina pectoris; Coronary artery disease.; Electrocardiography; Exercise tolerance test; Left bundle branch block